6 – 12 Aug 2025 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

Modelled US AQI · 8 cities · CAMS via Open-Meteo

50Weekly mean modelled AQI · Good

Mean PM2.5: 10 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-2.3 AQI compared with the previous week’s mean of 52.3.

Highest hourly estimate: 90 in Bangkok · 8 Aug, 19:00 GMT+7.

1344 of 1344 city-hours have a modelled AQI. These are estimates for roughly 45 km model grid cells, not monitoring-station measurements. How this report is made

Daily modelled US AQI

Day	Mean AQI	Low–high	Mean PM2.5 (µg/m³)	City-hours
Wed, 6 Aug	50.5Moderate	29–64	9.7	192 / 192
Thu, 7 Aug	46.9Good	28–56	8.2	192 / 192
Fri, 8 Aug	48.8Good	26–90	10.9	192 / 192
Sat, 9 Aug	52.9Moderate	24–76	11.8	192 / 192
Sun, 10 Aug	51.7Moderate	24–73	10.6	192 / 192
Mon, 11 Aug	50.7Moderate	27–64	10.4	192 / 192
Tue, 12 Aug	48.6Good	23–62	8.8	192 / 192

Hourly means (UTC+7)

Each cell averages the selected cities’ modelled AQI for that hour.

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	52	51	51	52	52	52	51	51	51	51	51	51	51	50	50	50	50	50	49	50	50	50	50	49
Thu	49	48	48	48	48	47	47	47	47	47	47	47	46	46	46	46	46	46	47	47	47	46	46	46
Fri	45	45	45	45	46	46	46	46	46	47	47	47	48	48	48	48	49	53	57	57	56	54	51	51
Sat	52	52	52	52	53	52	52	52	53	53	53	53	53	53	54	53	54	54	54	54	54	54	53	53
Sun	53	53	53	52	52	52	52	52	52	51	52	52	52	52	52	51	51	51	51	51	51	51	51	51
Mon	51	52	51	51	51	51	52	51	51	51	50	50	50	50	50	50	50	50	51	51	51	51	51	51
Tue	51	50	50	50	49	49	49	49	48	48	48	48	48	48	48	48	48	48	49	49	48	48	48	48

Cities by modelled US AQI

Sorted by weekly mean. Each city is a single model grid cell near its centre.

City	Mean AQI	Peak AQI	Mean PM2.5 (µg/m³)	Hours
Chiang Mai	59.9Moderate	76	13.9	168 / 168
Bangkok	57.2Moderate	90	11.9	168 / 168
Chiang Rai	53.5Moderate	60	10.9	168 / 168
Nakhon Ratchasima	53.3Moderate	58	10.9	168 / 168
Khon Kaen	51.2Moderate	67	9.8	168 / 168
Hat Yai	50.4Moderate	79	9.6	168 / 168
Phuket	45.1Good	56	8.6	168 / 168
Pattaya	29.4Good	39	4.8	168 / 168

City-hours by category

Good: 443

Moderate: 901

Unhealthy for Sensitive Groups: 0

Unhealthy: 0

Very Unhealthy: 0

Hazardous: 0

US AQI scale
AQI	Category
0–50	Good
51–100	Moderate
101–150	Unhealthy for Sensitive Groups
151–200	Unhealthy
201–300	Very Unhealthy
301+	Hazardous

How this report is made

Open-Meteo provides hourly estimates from the Copernicus Atmosphere Monitoring Service (CAMS) global model at roughly 45 km resolution. We use the grid cell nearest each city’s centre. Nearby places may share a cell, and local pollution can differ.

The AQI is the provider’s modelled US AQI across pollutants, one value per city per hour. Weekly, daily and hourly means average those values across the selected cities. PM2.5 is a concentration in µg/m³. These figures use a different basis from the measured PM2.5-derived AQI in the Malaysia and Singapore reports.

Days and hours use UTC+7. The report includes past model hours only, never forecasts. The previous-week comparison appears only when at least 90% of that week’s city-hours are available.

For official local readings and advice, visit Pollution Control Department · Air4Thai. Air-quality data: Open-Meteo and CAMS, licensed under CC BY 4.0. Haze Monitor is independent of these providers and local authorities.

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	52	51	51	52	52	52	51	51	51	51	51	51	51	50	50	50	50	50	49	50	50	50	50	49
Thu	49	48	48	48	48	47	47	47	47	47	47	47	46	46	46	46	46	46	47	47	47	46	46	46
Fri	45	45	45	45	46	46	46	46	46	47	47	47	48	48	48	48	49	53	57	57	56	54	51	51
Sat	52	52	52	52	53	52	52	52	53	53	53	53	53	53	54	53	54	54	54	54	54	54	53	53
Sun	53	53	53	52	52	52	52	52	52	51	52	52	52	52	52	51	51	51	51	51	51	51	51	51
Mon	51	52	51	51	51	51	52	51	51	51	50	50	50	50	50	50	50	50	51	51	51	51	51	51
Tue	51	50	50	50	49	49	49	49	48	48	48	48	48	48	48	48	48	48	49	49	48	48	48	48

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	52	51	51	52	52	52	51	51	51	51	51	51	51	50	50	50	50	50	49	50	50	50	50	49
Thu	49	48	48	48	48	47	47	47	47	47	47	47	46	46	46	46	46	46	47	47	47	46	46	46
Fri	45	45	45	45	46	46	46	46	46	47	47	47	48	48	48	48	49	53	57	57	56	54	51	51
Sat	52	52	52	52	53	52	52	52	53	53	53	53	53	53	54	53	54	54	54	54	54	54	53	53
Sun	53	53	53	52	52	52	52	52	52	51	52	52	52	52	52	51	51	51	51	51	51	51	51	51
Mon	51	52	51	51	51	51	52	51	51	51	50	50	50	50	50	50	50	50	51	51	51	51	51	51
Tue	51	50	50	50	49	49	49	49	48	48	48	48	48	48	48	48	48	48	49	49	48	48	48	48

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	52	51	51	52	52	52	51	51	51	51	51	51	51	50	50	50	50	50	49	50	50	50	50	49
Thu	49	48	48	48	48	47	47	47	47	47	47	47	46	46	46	46	46	46	47	47	47	46	46	46
Fri	45	45	45	45	46	46	46	46	46	47	47	47	48	48	48	48	49	53	57	57	56	54	51	51
Sat	52	52	52	52	53	52	52	52	53	53	53	53	53	53	54	53	54	54	54	54	54	54	53	53
Sun	53	53	53	52	52	52	52	52	52	51	52	52	52	52	52	51	51	51	51	51	51	51	51	51
Mon	51	52	51	51	51	51	52	51	51	51	50	50	50	50	50	50	50	50	51	51	51	51	51	51
Tue	51	50	50	50	49	49	49	49	48	48	48	48	48	48	48	48	48	48	49	49	48	48	48	48